The intent is a new list, nothing preselected, and the prompt showing inthe text(?) box. And it seems to work at first.

However, when I select the original radio button, the first list is restored, and the combo box shows my original selection!

I would like the prompt to be displayed as with the other radio buttons. I can't even find where the originally select value is stored! It LOOKS like the selection is cleared, as is the value, but the renedered control still shows a selection, even though with the previous list it showed the prompt